abstract

• A preliminary result of a new measurement of the K ?p µ µ- form factor parameters and branching fraction using the NA62 Run 1 data set collected in the years 2016 - 2018 is presented. From the observed sample of 28011 K ? p µ µ- event candidates with negligible background contamination, the form factor parameters a = -0.592 ± 0.013stat ± 0.007syst ± 0.001ext and b = -0.699 ± 0.046stat ± 0.035syst ± 0.003ext, and the branching fraction B(K ? p µ µ-) = (9.27 ± 0.07stat ± 0.08syst ± 0.04ext) × 10-8 are obtained. © Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License (CC BY-NC-ND 4.0).
• A preliminary result of a new measurement of the K%2b ?p%2bµ%2bµ- form factor parameters and branching fraction using the NA62 Run 1 data set collected in the years 2016 - 2018 is presented. From the observed sample of 28011 K%2b ? p%2bµ%2bµ- event candidates with negligible background contamination, the form factor parameters a%2b = -0.592 ± 0.013stat ± 0.007syst ± 0.001ext and b%2b = -0.699 ± 0.046stat ± 0.035syst ± 0.003ext, and the branching fraction B(K%2b ? p%2bµ%2bµ-) = (9.27 ± 0.07stat ± 0.08syst ± 0.04ext) × 10-8 are obtained. © Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License (CC BY-NC-ND 4.0).

authors

• Engelfried Jatzkowski Jurgen
• The NA62 Collaboration

publication date

• 2021-01-01

published in

• Proceedings of Science  Proceedings

keywords

• Approximation theory; Branching fractions; Data set; Form factors; Observed samples; High energy physics

Digital Object Identifier (DOI)

PubMed ID

start page

end page

volume

• 390

issue